Tree stand



FIG. 1 is a perspective view of a tree stand showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a perspective view thereof.

The broken lines in FIGS. 4 and 8 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a tree stand, as shown and described. 